From 479ccabc33e25efefa9925320764c929b387a152 Mon Sep 17 00:00:00 2001
From: Andre Vieira <andre.simoesdiasvieira@arm.com>
Date: Wed, 15 Apr 2020 12:53:46 +0100
Subject: [PATCH] Arm: MVE: Add mve vec_duplicate pattern

This patch fixes an ICE we were seeing due to a missing vec_duplicate pattern.

gcc/ChangeLog:
2020-04-15  Andre Vieira  <andre.simoesdiasvieira@arm.com>

	* config/arm/mve.md (mve_vec_duplicate<mode>): New pattern.
	(V_sz_elem2): Remove unused mode attribute.

gcc/testsuite/ChangeLog:
2020-04-15  Andre Vieira <andre.simoesdiasvieira@arm.com>
            Srinath Parvathaneni <srinath.parvathaneni@arm.com>

	* gcc.target/arm/mve/intrinsics/mve_vec_duplicate.c: New test.
---
 gcc/ChangeLog                                       |  5 +++++
 gcc/config/arm/mve.md                               |  9 +++++++--
 gcc/testsuite/ChangeLog                             |  5 +++++
 .../arm/mve/intrinsics/mve_vec_duplicate.c          | 13 +++++++++++++
 4 files changed, 30 insertions(+), 2 deletions(-)
 create mode 100644 gcc/testsuite/gcc.target/arm/mve/intrinsics/mve_vec_duplicate.c

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 82e0cd61b00..80e21dced64 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2020-04-15  Andre Vieira  <andre.simoesdiasvieira@arm.com>
+
+	* config/arm/mve.md (mve_vec_duplicate<mode>): New pattern.
+	(V_sz_elem2): Remove unused mode attribute.
+
 2020-04-15  Matthew Malcomson  <matthew.malcomson@arm.com>
 
 	* config/arm/arm.md (arm_movdi): Disallow for MVE.
diff --git a/gcc/config/arm/mve.md b/gcc/config/arm/mve.md
index 7054f7bf096..9cb18ef50e8 100644
--- a/gcc/config/arm/mve.md
+++ b/gcc/config/arm/mve.md
@@ -17,8 +17,6 @@
 ;; along with GCC; see the file COPYING3.  If not see
 ;; <http://www.gnu.org/licenses/>.
 
-(define_mode_attr V_sz_elem2 [(V16QI "s8") (V8HI "u16") (V4SI "u32")
-			      (V2DI "u64")])
 (define_mode_iterator MVE_types [V16QI V8HI V4SI V2DI TI V8HF V4SF V2DF])
 (define_mode_iterator MVE_VLD_ST [V16QI V8HI V4SI V8HF V4SF])
 (define_mode_iterator MVE_0 [V8HF V4SF])
@@ -11302,6 +11300,13 @@
  [(set_attr "type" "mve_move")
   (set_attr "length" "8")])
 
+(define_insn "*mve_vec_duplicate<mode>"
+ [(set (match_operand:MVE_VLD_ST 0 "s_register_operand" "=w")
+       (vec_duplicate:MVE_VLD_ST (match_operand:<V_elem> 1 "general_operand" "r")))]
+ "TARGET_HAVE_MVE || TARGET_HAVE_MVE_FLOAT"
+ "vdup.<V_sz_elem>\t%q0, %1"
+ [(set_attr "type" "mve_move")])
+
 ;; CDE instructions on MVE registers.
 
 (define_insn "arm_vcx1qv16qi"
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 0804bf57457..e4fc22197e6 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2020-04-15  Andre Vieira <andre.simoesdiasvieira@arm.com>
+            Srinath Parvathaneni <srinath.parvathaneni@arm.com>
+
+	* gcc.target/arm/mve/intrinsics/mve_vec_duplicate.c: New test.
+
 2020-04-15  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c/94593
diff --git a/gcc/testsuite/gcc.target/arm/mve/intrinsics/mve_vec_duplicate.c b/gcc/testsuite/gcc.target/arm/mve/intrinsics/mve_vec_duplicate.c
new file mode 100644
index 00000000000..eda836151b3
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/mve/intrinsics/mve_vec_duplicate.c
@@ -0,0 +1,13 @@
+/* { dg-require-effective-target arm_v8_1m_mve_fp_ok } */
+/* { dg-add-options arm_v8_1m_mve_fp } */
+/* { dg-additional-options "-O2" } */
+
+#include "arm_mve.h"
+
+float32x4_t a;
+
+void foo (void)
+{
+  a = 1.41176471f - 0.47058824f * a;
+}
+
-- 
2.30.2